> Also, while at it, rename all uses of 'unsigned long long' to> the much shorter u64.> > This makes the appearance of the prototypes a lot nicer - and> it also uncovered a few bugs where (yet unused) API variants> had 'long' as their return type instead of u64.

Did you consider making atomic64_t a signed type on 32-bit x86 like itis on all 64-bit platforms, and like atomic_t is everywhere?